On 6/3/21 8:22 PM, rashmi.a@xxxxxxxxx wrote:
> From: Rashmi A <rashmi.a@xxxxxxxxx>
>
> If clock-frequency property is set and it is not the same as the current
> clock rate of clk_xin(base clock frequency), set clk_xin to use the
> provided clock rate.
>
> Signed-off-by: Rashmi A <rashmi.a@xxxxxxxxx>
> Reviewed-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-of-arasan.c | 14 ++++++++++++--
> 1 file changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
> index 839965f7c717..0e7c07ed9690 100644
> --- a/drivers/mmc/host/sdhci-of-arasan.c
> +++ b/drivers/mmc/host/sdhci-of-arasan.c
> @@ -1542,6 +1542,8 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
> }
> }
>
> + sdhci_get_of_property(pdev);
> +
> sdhci_arasan->clk_ahb = devm_clk_get(dev, "clk_ahb");
> if (IS_ERR(sdhci_arasan->clk_ahb)) {
> ret = dev_err_probe(dev, PTR_ERR(sdhci_arasan->clk_ahb),
> @@ -1561,14 +1563,22 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
> goto err_pltfm_free;
> }
>
> + /* If clock-frequency property is set, use the provided value */
> + if (pltfm_host->clock &&
> + pltfm_host->clock != clk_get_rate(clk_xin)) {
> + ret = clk_set_rate(clk_xin, pltfm_host->clock);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to set SD clock rate\n");
> + goto clk_dis_ahb;
> + }
> + }
> +
> ret = clk_prepare_enable(clk_xin);
> if (ret) {
> dev_err(dev, "Unable to enable SD clock.\n");
> goto clk_dis_ahb;
> }
>
> - sdhci_get_of_property(pdev);
> -
> if (of_property_read_bool(np, "xlnx,fails-without-test-cd"))
> sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_FORCE_CDTEST;
>
>
Manish/Sai: Please retest this on Xilinx SOC.
Thanks,
Michal
